Air purifier



FIG. 1 is a front perspective view of an air purifier showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view of thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlarged view of portion 9 of FIG. 1.

The dash-dash broken lines in the drawings illustrate the portions of the air purifier which form no part of the claimed design.

The dot-dash broken lines in the drawings are included for the purpose of illustrating the partial enlarged views. 

CLAIM The ornamental design for an air purifier, as shown and described. 